I wouldn’t expect much. I think I tried to sell mine but ended up selling it for scrap metal after no one showed interest. It may eventually be worth some money, but you’ll have to wait about 35-40 years for that.

Someone bought my stock tips years ago (dare I say over a decade ago?) when I had the midpipe and catback changed. The stock midpipe stayed at the muffler shop and the rest of the stock catback was junked.